<template>
    <el-upload
      class="avatar-uploader"
      action="http://localhost:8081/dbgtool/img"
      :show-file-list="false"
      :on-success="handleAvatarSuccess"
      :before-upload="beforeAvatarUpload"
    >
      <img v-if="imageUrl" :src="imageUrl" class="avatar" />
      <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
    </el-upload>
  </template>
  
  <script>
  import { ref } from 'vue'
  import { ElMessage } from 'element-plus'
  // import { Plus } from '@element-plus/icons-vue'

  export default {
    name: "imgUpload",
    setup() {
      const imageUrl = ref('')
      const handleAvatarSuccess = (
        response,
        uploadFile
      ) => {
        imageUrl.value = URL.createObjectURL(uploadFile.raw)
      }
      
      const beforeAvatarUpload = (rawFile) => {
        if (rawFile.type !== 'image/jpeg') {
          ElMessage.error('Avatar picture must be JPG format!')
          return false
        } else if (rawFile.size / 1024 / 1024 > 2) {
          ElMessage.error('Avatar picture size can not exceed 2MB!')
          return false
        }
        return true
      }
      return {
        handleAvatarSuccess, beforeAvatarUpload, imageUrl
      }
    }
  }
  
  </script>
  
  <style scoped>
  .avatar-uploader .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
  </style>
  
  <style>
  .avatar-uploader .el-upload {
    border: 1px dashed var(--el-border-color);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: var(--el-transition-duration-fast);
  }
  
  .avatar-uploader .el-upload:hover {
    border-color: var(--el-color-primary);
  }
  
  .el-icon.avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    text-align: center;
  }
  </style>
  